Plumbing license requirements by state

AL

Alabama Plumbing License Guide

Alabama plumbing companies should verify board license status, apprentice registration, journeyman or master scope, local permit rules, inspection timing, renewal dates, and gas-fitting responsibilities before assigning regulated work.

AK

Alaska Plumbing License Guide

Alaska plumbing companies should verify certificate of fitness status, mechanical administrator or contractor requirements, permit authority, inspection timing, renewal dates, freeze-risk planning, and remote site access before dispatch.

AZ

Arizona Plumbing License Guide

Arizona plumbing companies should verify ROC license classification, qualifying party status, residential or commercial scope, bond and insurance records, local permit rules, inspection timing, and renewal dates before bidding.

AR

Arkansas Plumbing License Guide

Arkansas plumbing companies should verify the correct license or apprentice registration, local permit requirements, inspection timing, supervision rules, renewal dates, and public-health documentation before assigning regulated plumbing work.

CA

California Plumbing License Guide

California plumbing companies should verify CSLB C-36 license status, qualifying individual records, bond and insurance details, local permit requirements, inspection timing, renewal dates, and specialty scope before bidding or dispatching.

CO

Colorado Plumbing License Guide

Colorado plumbing companies should verify State Plumbing Board license status, apprentice registration, journeyman or master scope, contractor registration needs, local permit rules, inspection timing, and renewal dates before dispatch.

CT

Connecticut Plumbing License Guide

Connecticut plumbing companies should verify DCP license status, contractor or journeyperson scope, apprentice supervision, local permit requirements, inspection timing, renewal dates, and insurance records before scheduling regulated work.

DE

Delaware Plumbing License Guide

Delaware plumbing companies should verify DPR license status, DELPROS renewal records, master or journeyperson scope, local permit requirements, inspection timing, and insurance details before assigning regulated plumbing work.

FL

Florida Plumbing License Guide

Florida plumbing companies should verify DBPR license status, certified or registered scope, local permit requirements, inspection timing, insurance records, renewal dates, and storm documentation before bidding or dispatching.

GA

Georgia Plumbing License Guide

Georgia plumbing companies should verify state board license status, journeyman or master scope, local permit rules, inspection timing, renewal dates, insurance records, and utility requirements before assigning regulated plumbing work.

HI

Hawaii Plumbing License Guide

Hawaii plumbing companies should verify contractor classification, journey worker or master plumber status, county permit rules, inspection timing, renewal records, and inter-island travel needs before scheduling regulated plumbing work.

ID

Idaho Plumbing License Guide

Idaho plumbing companies should verify DOPL license status, apprentice or journeyman records, contractor responsibilities, permit rules, inspection timing, renewal dates, and rural access notes before assigning regulated work.

IL

Illinois Plumbing License Guide

Illinois plumbing licenses and plumbing program guidance are handled through the Illinois Department of Public Health. Plumbers, apprentices, and plumbing businesses should verify state licensing, local permits, code requirements, and inspection rules before work begins.

IN

Indiana Plumbing License Guide

Indiana plumbing companies should verify Plumbing Commission license status, apprentice or journeyman records, contractor responsibilities, local permit requirements, inspection timing, and renewal dates before dispatching regulated work.

IA

Iowa Plumbing License Guide

Iowa plumbing companies should verify PMSB license status, apprentice, journeyperson, master, or contractor records, local permit requirements, inspection timing, continuing education, and renewal dates before dispatching regulated work.

KS

Kansas Plumbing License Guide

Kansas plumbing companies should verify the city or county authority for each job, including local plumbing license or contractor registration, permit requirements, inspections, insurance documents, and renewal dates.

KY

Kentucky Plumbing License Guide

Kentucky plumbing companies should verify Division of Plumbing license status, journeyman or master scope, permit requirements, inspection timing, renewal dates, reciprocity assumptions, and site access before dispatching regulated work.

LA

Louisiana Plumbing License Guide

Louisiana plumbing companies should verify State Plumbing Board license status, apprentice or journeyman records, master responsibility, local permit rules, inspection timing, storm documentation, and renewal dates before dispatch.

ME

Maine Plumbing License Guide

Maine plumbing companies should verify board license status, trainee, journeyman, or master scope, local permit requirements, inspection timing, renewal dates, reciprocity, and seasonal access before scheduling work.

MD

Maryland Plumbing License Guide

Maryland plumbing companies should verify Board of Plumbing license status, apprentice, journey, master, or gas fitter scope, local registration, permit requirements, inspection timing, and renewal dates before dispatch.

MA

Massachusetts Plumbing License Guide

Massachusetts plumbing companies should verify board license status, apprentice, journeyman, master, or gas fitter scope, municipal permit requirements, inspection timing, continuing education, and renewal dates before dispatch.

MI

Michigan Plumbing License Guide

Michigan plumbing companies should verify the active license or registration tied to each worker, confirm permit and inspection rules for the property address, document water heater, sewer, backflow, and remodel scope, and keep renewal dates visible before dispatch.

MN

Minnesota Plumbing License Guide

Minnesota plumbing companies should verify DLI license records, confirm whether plan review or inspection permits apply, check local government agreements, assign work by credential, and keep renewal, permit, and inspection notes tied to the customer file.

MS

Mississippi Plumbing License Guide

Mississippi plumbing companies should verify whether the job requires contractor licensing, confirm local permit and inspection rules, keep qualifying party and renewal details updated, and document storm, sewer, water heater, and commercial work before dispatch.

MO

Missouri Plumbing License Guide

Missouri plumbing companies should start with the property address, verify the city or county licensing authority, confirm permit and inspection requirements, track insurance and registration renewals, and document code-sensitive work before scheduling.

MT

Montana Plumbing License Guide

Montana plumbing companies should verify Board of Plumbers license status, confirm journeyman, master, or endorsement scope, check permit and inspection rules, plan for rural or mountain access, and keep renewal records tied to each worker.

NE

Nebraska Plumbing License Guide

Nebraska plumbing companies should verify the local authority for each job address, confirm plumber or contractor registration requirements, track permit and inspection steps, maintain insurance records, and document rural access, wells, and sewer work before dispatch.

NV

Nevada Plumbing License Guide

Nevada plumbing companies should verify the contractor license classification, qualifying party, bond and license limit details, local permits, inspection requirements, and renewal dates before scheduling plumbing installation, repair, or commercial service work.

NH

New Hampshire Plumbing License Guide

New Hampshire plumbing companies should verify OPLC license records, match apprentice, journeyman, master, or gas scope to the job, confirm local permit and inspection rules, and keep seasonal access and renewal notes visible before dispatch.

NJ

New Jersey Plumbing License Guide

New Jersey plumbing companies should verify master plumber and business records, confirm municipal permits and inspections, document job scope carefully, track renewal obligations, and keep access notes for dense, multifamily, commercial, and coastal properties.

NM

New Mexico Plumbing License Guide

New Mexico plumbing companies should verify Construction Industries Division license context, match journeyman or contractor scope to the job, confirm permit and inspection requirements, document water, septic, and rural access details, and keep renewals visible.

NY

New York Plumbing License Guide

New York plumbing companies should verify the city or county authority for each job, confirm master plumber or contractor registration requirements, track permits and inspections, and document building access, shutoffs, tenant notices, and closeout proof.

NC

North Carolina Plumbing License Guide

North Carolina plumbing companies should verify contractor license status and classification, confirm permit and inspection rules for the job address, document scope and supervision, and keep renewal, insurance, and local approval records tied to each job.

ND

North Dakota Plumbing License Guide

North Dakota plumbing companies should verify board license status, assign work by apprentice, journeyman, or master scope, confirm permit and inspection rules, and document winter access, wells, pumps, and rural service conditions before dispatch.

OH

Ohio Plumbing License Guide

Ohio plumbing companies should verify contractor license status for regulated work, confirm local permit and inspection requirements, track municipal registrations, and document commercial, industrial, multifamily, and residential service details before dispatch.

OK

Oklahoma Plumbing License Guide

Oklahoma plumbing companies should verify Construction Industries Board license records, match apprentice, journeyman, or contractor scope to the job, confirm permit and inspection requirements, and document storm, rural, and commercial conditions before dispatch.

OR

Oregon Plumbing License Guide

Oregon plumbing companies should verify license status through state building-code resources, match journeyman or contractor scope to the job, confirm permits and inspections, and document wet-weather, rural, coastal, and commercial details before dispatch.

PA

Pennsylvania Plumbing License Guide

Pennsylvania plumbing companies should verify the local authority for each job address, confirm plumber or contractor registration requirements, track permits and inspections, and document old-pipe, multifamily, commercial, and home-improvement records before work begins.

RI

Rhode Island Plumbing License Guide

Rhode Island plumbing companies should verify DLT license records, match journeyperson or master scope to the job, confirm local permit and inspection rules, and document coastal, multifamily, restaurant, and old-building conditions before dispatch.

SC

South Carolina Plumbing License Guide

South Carolina plumbing companies should verify contractor license classification and scope, confirm local permits and inspections, document coastal, crawlspace, and commercial conditions, and keep renewal, insurance, and closeout records tied to each job.

SD

South Dakota Plumbing License Guide

South Dakota plumbing companies should verify Plumbing Commission license records, match apprentice, journeyman, or contractor scope to the job, confirm permit and inspection requirements, and document rural access, winter conditions, wells, and pumps before dispatch.

TN

Tennessee Plumbing License Guide

Tennessee plumbing companies should verify contractor or limited licensed plumber status, confirm local permit and inspection requirements, document job scope and supervision, and keep insurance, renewal, storm, and customer approval records tied to each job.

TX

Texas Plumbing License Guide

Texas plumbing companies should verify TSBPE credential status, match apprentice, tradesman, journeyman, or master scope to the job, confirm local permit and inspection rules, and document heat, storm, rural, and commercial conditions before dispatch.

UT

Utah Plumbing License Guide

Utah plumbing companies should verify DOPL credential status, match apprentice, journeyman, master, or contractor scope to the job, confirm local permit and inspection rules, and document mountain access, water systems, and customer approvals before dispatch.

VT

Vermont Plumbing License Guide

Vermont plumbing companies should verify license status, match journeyman or master scope to the work, confirm local permit and inspection rules, and document seasonal access, wells, freeze history, and caretaker details before dispatch.

VA

Virginia Plumbing License Guide

Virginia plumbing companies should verify DPOR tradesman or contractor records, match license scope to plumbing or gas-related work, confirm local permits and inspections, and document access, crawlspace, commercial, and customer approval details before dispatch.

WA

Washington Plumbing License Guide

Washington plumbing companies should verify L&I certification or trainee status, confirm contractor registration and permit requirements, track inspections, and document wet-weather, crawlspace, commercial, and customer approval details before dispatch.

WV

West Virginia Plumbing License Guide

West Virginia plumbing companies should verify plumber certification and contractor records, confirm local permit and inspection requirements, document mountain or rural access, and keep well, sewer, water heater, and customer approval notes tied to each job.

WI

Wisconsin Plumbing License Guide

Wisconsin plumbing companies should verify DSPS license records, match apprentice, journeyman, or master scope to the job, confirm permit and inspection requirements, and document winter access, lake-home systems, and customer approvals before dispatch.

WY

Wyoming Plumbing License Guide

Wyoming plumbing companies should start with the property address, verify city or county plumber or contractor requirements, confirm permits and inspections, and document ranch, mountain, winter, well, and pump details before dispatch.

Do plumbing companies need a master plumber?

Many states require a master plumber, responsible master plumber, or qualifying individual before a plumbing business can offer regulated services.

Are plumbing apprentices licensed?

In many states apprentices must register or work under a licensed plumber. Other states use different entry-level structures, so check the state guide before hiring or assigning work.

What plumbing records should stay with each job?

Keep permit numbers, fixture or system details, photos, inspection notes, parts, technician credentials, customer approvals, and invoice history together.